Boiler-scraper.



WIJ. OMER & J. c. STULL.

BOILER SGRAPER.

APPLIOATION FILED JUNE 17, 1913.

1,095,591 Patented May 5, 1914.

3 SHEETS-SHEET 1.

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W. LOMER & J. (L'STULL.

' BOILER SORAPER.

APPLICATION TILED JUNE 1-7, 1913.

3 SHEETS-SHEET 2.

COLUMBIA FMNOGRAPH 120.. WASHINGTON. D. C.

W. J. OMER & J. C. STULL.

BOILER SGRAPER.

APPLICATION FILED JUNE 17, 1913.

witneoow Patented May 5, 1914.

3 SHEETS-SHEET 3.

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onTTn n sTATEs PATENT orrioa.

WILLIAM J. OMER AND JAMES C. STULL, OF THOMAS, OKLAHOMA.

BOILER-SCRAPER.

Specification of Letters Patent.

Patented May 5, 1914.

Application filed June 17, 1913. Serial No. 774,203.

To all whom it may concern:

Be itknown that we, WILLIAM J. OMER and JAMES C. STULL, citizens of theUnited States, residing at Thomas, in the county of Custer and State ofOklahoma, have invented certain new and useful Improvements inBoiler-Scrapers, of which the following is a specification.

This invention relates to scrapers or cleaners for preventing theaccumulation of scale and removing the same after it has accumulatedupon the exterior of boiler tubes, condenser pipes, or similar devices.The primary object of this invention is the provision of a scraper forremoving the scale, incrustations and the like which form upon boilertubes or fines and shells, owing to the generating of steam therein,such incrustations impairing the efficiency of the boiler.

Another object of this invention is the provision of a scraper which ismounted within the boiler and has a plurality of scraping blades whichengage the outer surface of the boiler tubes or fines and which isoperated by a steam cylinder also mounted within the boiler.

lVith the foregoing and other objects in view, this invention consistsin such novel features of construction, combination and arrangement ofparts as will be hereinafter more fully described, illustrated in theaccompanying drawings and claimed.

In describing the invention in detail, reference will be had to theaccompanying drawings wherein like characters of reference refer tocorresponding parts and wherein,

Figure l is a cross-sectional view through a boiler, showing theimproved scraper applied thereto; Fig. 2 is a central longitudinalsectional view through the boiler, also showing the scraper; Fig. 3 is adetail sectional view of a part of the scraper; Fig. 4 is a detail viewshowing the manner of connecting the scraper to the cylinder; Fig. 5 isa detail view of the manner of adjusting the scraping blades; and, Fig.6 is a detail view of one of the scraping blades.

Referring more particularly to the drawings the numeral 1 designates aboiler of any ordinary construction which has a plurality of boilertubes or fiues 2 passing longitudinally therethrough for the purpose ofgenerating steam to operate various types of steam engines, for heatingpurposes,'or the like. The boiler 1 has the ordinary steam outlet pipe 8connected to its upper end which passes upwardly out from the upper sideof the boiler and extends to the various mechanism for which the steamis supplied as is shown in Fig. 2 of the drawings. A pipe 5 is connectedto the steam outlet pipe 3 as at 6 and extends downwardly through theupper side of the boiler 1, having its lower and inner end connected toa cylinder 7 as at 8. The pipe 5 has a collar 9 mounted thereabout andadjacent the outer surface of the side of the boiler 1 so as to renderthe joint between the pipe 5 and the boiler fluidtight. A collar 10 isalso mounted about the lower end of the pipe 5 and contacts with theouter surface of the cylinder 7 providing a fluid-tight joint for theconnection be tween the pipe 5 and the cylinder. The outlet pipe 11 isconnected to the cylinder 7 as at 12 and extends upwardly and outthrough the opening 13 formed in the side of the boiler 1. In thedrawings the cylinder 7 is shown securely held in its proper position inthe interior of the boiler 1 by means of brackets 14: and 15 which aresecured t0 the cylinder 7 as at 16 and to one end of the boiler as at17.

The cylinder 7 has slidably mounted therein a piston 18 which has apiston rod 19 connected thereto. The piston 19 passes outwardly throughone end of the cylinder 7 and a bearing 20 which is formed thereupon andis connected to a link or arm 22 by means of the screw threads which areformed upon its outer end and the screwthreaded aperture 23 which isformed in the end of the arm 22. The arm 22 is pivotally mounted upon apin 24 which is carried by a triangular shaped bracket 25. The bracket25 is rigidly secured by means of bolts 26 to a bar 27 which extendsparallel with the tubes or lines 2 of the boiler. Valves 70, 71, 72 and73 respectively are provided to effect proper operation of the cylinderpiston.

The bar 27 has a plurality of angle irons 28 connected thereto andextending laterally across the boiler. The outer ends of the angle irons28 are connected to bars 29 which extend parallel with the bar 27 andare in the same plane. The angle irons 28 have a plurality of brackets30 which are also constructed of angle irons secured thereto anddepending therefrom. The brackets 30 have shafts 31 journaled thereinupon which are rotatably mounted rollers 32. The rollers 32 have theirsurfaces concave so as to rest upon the tubes 2 of the boiler as isclearly shown in Fig. 1 of the drawings and to pass freely thereupon.

The angle irons 28 have a plurality of vertically extending bars 33connected thereto and to angle bars 34: which extend along the boilerbeneath the lower row of the tubes 2. The vertical bars 33 have aplurality of scraping members 35 connected thereto by means of bolts 36.The bolts 36 have their ends 37 curved so as to etliciently engage thescraping member 35 as is shown in Fig. 3 of the drawings. The scrapingmembers have their vertical sides 38 concave, the upper and lowercorners or angles meeting the opposite scraping member 35 in the centerof the tube or flue on its upper and lower surface thus completelysurrounding the curved sides of the tubes 2 for scraping the scale orincrustations off the same.

The angle irons 34 have a plurality of brackets 39 connected theretowhich brackets carry rollers 40. The rollers 40 engage the under surfaceof the lowermost of the tubes 2 of the boiler and serve a purposeidentical with the rollers 32. The vertical bars 33 are braced by meansof cross braces 41. The angle irons 3st have bars 42 connected thereto,which bars extend parallel with the bars 29 and 27 and also the tubes 2of the boiler and have brackets 13 connected thereto as at 4 1. Thebrackets 43 are connected to vertical rods l5, which rods are in turnconnected to the angle irons 34: as at 46. The lower ends of the bars 45have enlarged portions 47 formed thereupon, which enlarged portions havea bar as mounted in an opening 49 formed therein. The bars 4L8 have aplurality of rack teeth 50 formed upon one side thereof and intermediatetheir ends. The upper end of the bar as passes through projections 51which are formed upon the rods 45 and is adjustably connected to bar 45by means of a bolt 53 which extends through a slot 54: formed on oneside of the bar 45.

Pinions 55 which are carried by pins 56 mesh with the rack teeth 50which are formed upon the bars 48. The pins are carried by the lowerends of bars 57 which are pivoted to a bar 58 by means of pins 5 carriedby the bar 58. The pins 59 are seated in slots 60 which are formed inthe bars 57 as is clearly shown in Figs. 2 and 5 of the drawings. Thebars 4-8 have plates 63 connected to their lower ends, which plates areshaped to form an arc of a circle and are adapted to scrape the innersurface of the lower portion of the boiler 1 when the scraper carryingframe is reciprocated.

When it is desired to operate the scraping mechanism for cleansing thescale or the like off the tubes or fines of the boiler, such operationis as follows: The valves 73 and being open, the piston within thecylinder will travel to the opposite end, that is, providing the saidpiston be in the position indicated in Fig. 2. By closing the valves 73and 70 and opening the valves 71 and 72, the piston will travel orreturn to its normal position, (that indicated in the said Fig. 2) thuscompleting the reciprocating action desired. Although manually operatedmeans is shown, any suitable automatic means may be utilized in thepractical application of the invention. The reciprocatory movement ofthe piston 18 within the cylinder 7 will impart a reciprocatory movementto the frame which is composed of the various bars 27, 29, 12 and 33,and the angle irons 28 and 34: and carries the scraping members 35. henthe scraper carrying frame reaches the end of its rearward stroke as isindicated by the arrow (1, the end 61 of the bar 58 will engage the rearend of the boiler and operate the same, causing it to move in thedirection of the arrow Z) and ac cordingly operate the pinions 55 which.are carried by the bars 57. The operating of the pinions 55 willaccordingly operate or move the bars 48 upwardly and cause the scrapingmembers or plates 63 to move out of engagement with the interior of theboiler shell 1. hen the scraper carrying frame has reached the end ofthe stroke as is indicated by the arrow 5, the end 62 of the bar 58 willstrike the front or for ward end of the boiler and again operate the bar58, causing it to operate the pinions 55 and the bars 48, thus causingthe scrapers or plates 63 to move into engage ment with the shell of theboiler. Thus the scrapers or plates 63 are in engagement with the shell1 of the boiler only during the rearward motion of the scraper carryingframe. This will cause all of the scale or the like which is upon. thesides of the tubes and the shell to be carried to the rear end of theboiler from whence it may be ejected in a suitable manner.

In practical fields, certain minor features of construction, combinationand arrange-- ment of parts may necessitate alterations to which thepatentee is entitled, provided such alterations are comprehended withinthe scope of what is claimed.

What is claimed is 1. The combination with a boiler, of a longitudinallyreciprocal frame within said boiler, and vertically reciprocablemechanism operable upon said frame, as and for the purpose set forth.

2. The combination with a boiler, of a longitudinally reciprocable framewithin said boiler, means carried by said frame engageable with thetubes of the boiler, vertically reciprocable means operable upon saidframe, and scrapers carried by said means engageable with the inner wallof the boiler, as and for the purpose set forth.

3. The combination with a boiler, of a frame slidably mounted withinsaid boiler, a plurality of scraper bars carried by the said frame, andmeans carried by the said frame for automatically actuating the saidbars and causing the same to engage the inner wall of the boiler duringthe sliding movement of the said frame in one direction.

4. The combination with a boiler having a plurality of tubes extendingtherethrough, of a frame slidably mounted within said boiler, aplurality of scrapers carried by said frame and engaging said tubes,scraper bars depending from the said frame, and means carried by thesaid frame whereby the said scrapers and the said scraper bars may beactuated to prevent a scraping operation during the sliding movement ofthe said frame in one direction.

5. The combination with a boiler having a plurality of tubes extendingtherethrough, a frame slidably mounted within said boiler, scrapingmeans carried by the said frame and disposed for engagement with thesaid tubes, a plurality of vertically movable scraper bars carried bythe said frame, and means carried by the said frame and connected to allof the said bars for automatically forcing the latter into engagementwith the interior of the boiler only during the movement of the saidframe in one direction, as and for the purpose set forth.

6. The combination with a boiler, of a frame slidably mounted withinsaid boiler, hanger bars depending from the said frame, a sliding rackbar movable vertically within each hanger bar, a scraper carried by eachrack bar, an operating rod having connection with each rack bar, saidbar being disposed for engagement with one end of the boiler forautomatically actuating the said rack bars to engage the said scraperswith the inner wall of the boiler only during the movement of the saidframe in one direction.

7. The combination with a boiler, of a frame slidably mounted withinsaid boiler, a plurality of hanger bars carried by the said frame, arack bar moimted for vertical movement upon each hanger bar, scraperscarried by each hanger bar, a pinion carried by each hanger bar the saidpinion being disposed for engagement with the said rack bars, meansconnecting the said rack bars with suitable operating means forautomatically actuating the said scrapers during the movement of thesaid frame in one direction, as and for the purpose set forth.

8. The combination with a boiler, of a frame slidably mounted withinsaid boiler, rack bars vertically adjustable with respect to said frame,a scraper carried by each rack bar, an operating rod having connectionwith each rack bar, the said operating rod, during sliding movement ofthe said frame, adapted to engage one end of the boiler to automaticallyactuate the said rack bars and bring the said scrapers into engagementwith the inner wall of the boiler, as and for the purpose set forth.

9. The combination with a boiler having a plurality of tubes extendingtherethrough. of a frame slidably mounted within said boiler, the saidframe comprising a plurality of vertically extending parallel strips, aplurality of scrapers carried by each strip, the said scrapers beingsecured to the said strip between the tubes of the boiler, one scraperbeing disposed for engagement With two of the boiler tubes, and meansfor transmitting reciprocatory movement to the said frame, as and forthe purpose set forth.

10. The combination with a boiler having a plurality of tubes extendingtherethrough, of a frame slidably mounted within said boiler, the saidframe comprising a plurality of uniformly spaced vertically extendingstrips, a plurality of scrapers carried by each strip, one scraper beingdisposed for engagement with two of the tubes, the vertical walls ofeach scraper being shaped to conform to the configuration of the saidtubes, and means for transmitting reciprocatory movement to the saidframe, as and for the purpose set forth.

11. The combination with a boiler having a plurality of tubes extendingtherethrough, a frame slidably mounted within said boiler, a pluralityof scrapers carried by said frame, one scraper being disposed forengagement with two of the said tubes, a sheave carried by the saidframe, the said sheave being disposed for engagement with certain of thesaid tubes, and means for transmitting reciprocatory movement to thesaid frame, of a plurality of hanger bars carried by the said frame, arack bar vertically adjustable with respect to each hanger bar, scraperbars carried by each rack bar, the said bars being shaped to conform tothe configuration of the inner wall of the boiler, an operating rodhaving connection with each rack bar, the said operating rod adapted toextend beyond the extremities of the frame, the

said rack bar, during the reciprocation of frame to engage the innerWall of the boiler the frame, adapted to engage the respeconly duringone of the reciprocating strokes tire ends of the boiler toautomatically of the frame.

actuate the said rack bars for raising and In testimony whereof We aflixour signa- 5 lowering the said scraper bars into and out tnres inpresence of tWo Witnesses.

of engagement With the inner Wall of the VILLIAM J. OMER.

boiler, as and for the purpose set forth. JAMES C. STULL.

12. The combination With a boiler, of a Witnesses:

frame, means reciprocating said frame, and I MILo C. HUsToN,

10 means operating automatically upon the FRANK FIALLE.

Copies of this patent may be obtained for five cents each, by addressingthe Commissioner of Eatents, Washington, D. C."

